The following is a detailed credit card method for your reference:

Please back up in advance, and then download the latest version of the development card brush package in Xiaomi official website. Link/# or/thread-790375-1-1.html.

After downloading, you need to rename the refresh package to update it, copy it directly into the memory card (remember that it is not a secondary folder, assuming that the memory card is a disk "H" in the computer, and the update file should be h:/update.zip), and then turn off the phone.

1, press the volume key "+"and the power key to enter the recovery interface.

2. Select the language you want, and then select "Clear Data".

3. Select "Clear All Data" and press the power button to confirm.

4. Press the power button and select the "Confirm" option to clear the data.

5. This operation will erase the related data in the ROM, so please make a backup.

6. Enter Recovery and select "Install Update. Zip to System1".

7. Click "OK" and the system will refresh. 8. Enter "Reboot" and select "Reboot into the system 1".